19770471

素因数分解:

$3^2\times 7^2\times {\mathrm{127}}^1\times {\mathrm{353}}^1$

素因数の和:500

約数の個数: 36

約数和(自身を含む): 33576192

約数和(自身を除く): 13805721

約数列:

[1, 3, 7, 9, 21, 49, 63, 127, 147, 353, 381, 441, 889, 1059, 1143, 2471, 2667, 3177, 6223, 7413, 8001, 17297, 18669, 22239, 44831, 51891, 56007, 134493, 155673, 313817, 403479, 941451, 2196719, 2824353, 6590157, 19770471]

約数ペア:

[(1, 19770471), (3, 6590157), (7, 2824353), (9, 2196719), (21, 941451), (49, 403479), (63, 313817), (127, 155673), (147, 134493), (353, 56007), (381, 51891), (441, 44831), (889, 22239), (1059, 18669), (1143, 17297), (2471, 8001), (2667, 7413), (3177, 6223)]